CN110328850A - A kind of bonded 3D printer of large size powder bed hydrojet - Google Patents

Abstract

The invention provides a large-scale powder bed spray liquid bonding type 3D printer, including a movable powder bed, a double gantry frame, an X-axis motion mechanism, a Y-axis motion mechanism, a Z-axis motion mechanism, a powder spreading device and an adhesion promoter The dripping device, the X-axis motion mechanism, the Y-axis motion mechanism and the Z-axis motion mechanism are perpendicular to each other, the Y-axis motion mechanism is connected to the double gantry frame and the Z-axis motion mechanism, and the adhesion promoter spraying device is connected to the X-axis motion mechanism Connected and installed on the side of the powder spreading device, the powder spreading device is connected with the Z-axis movement mechanism, and the powder bed driving mechanism drives the powder bed to reciprocate to expand the printing area. Beneficial effects of the present invention: the powder material is mixed with the binder and laid on the powder bed, and then the adhesion promoter is sprayed by the adhesion promoter spraying device, and after reacting with the binder, it is solidified and formed, and finally a three-dimensional entity is printed, which can be printed The size range of the model is large, the printing efficiency is high, and the cost is low, which is especially suitable for the rapid production of large-scale industrial models.

Description

A large powder bed spray liquid bonding 3D printer

technical field

The invention relates to the technical field of 3D printing equipment, in particular to a large powder bed spray-liquid bonding 3D printer.

Background technique

With the continuous development of 3D printing technology, various forms of 3D printing equipment continue to appear. Most of these 3D printing devices are desktop-level and can only print models of small size. Moreover, the efficiency of 3D printers is low, and printing takes a long time. Printing materials are expensive. Therefore, there is an urgent need to develop a 3D printing device for large-scale three-dimensional models with high printing efficiency to meet people's printing needs for large-scale models.

Contents of the invention

In view of this, the embodiment of the present invention provides a large powder bed spray liquid bonding 3D printer, which can quickly and efficiently complete the 3D printing of large 3D models.

An embodiment of the present invention provides a large-scale powder bed spray-liquid bonding 3D printer, including a movable powder bed, a double gantry frame, an X-axis motion mechanism, a Y-axis motion mechanism, a Z-axis motion mechanism, a powder spreading device and Adhesion promoter spraying device, the movable powder bed includes a powder bed drive mechanism and a powder bed, the powder bed is located inside the double gantry frame, the powder bed drive mechanism is connected to the powder bed and can drive The powder bed moves, the Y-axis motion mechanism is arranged on the upper part of the double gantry frame, the Y-axis motion mechanism is vertically connected to the Z-axis motion mechanism, and the lower end of the Z-axis motion mechanism is vertically connected to the X-axis A movement mechanism, the X-axis movement mechanism connects the powder spreading device and the adhesion promoter spraying device, the powder spreading device is arranged above the powder bed, and the powder spreading device includes a powder spreading silo, The opening and closing motor and the T-shaped opening and closing baffle. The movement mechanism, the Y-axis movement mechanism and the Z-axis movement mechanism are used to move the powder spreading device to a preset position, and the opening and closing motor drives the T-shaped opening and closing baffle to move upwards to open the powder spreading device. silo, the opening and closing motor drives the T-shaped opening and closing baffle to move down to close the powder spreading silo, the powder spreading device is used to lay powder material on the powder bed, and the adhesion promoter spray The dripping device is used to spray the adhesion promoter at a preset position on the powder bed.

Further, the powder bed driving mechanism includes a powder bed support frame, a powder bed driving motor, an optical axis guide rail slide table, an optical axis guide rail and a powder bed driving screw, and the powder bed driving motor is fixedly installed on the powder bed support On the frame, one end of the powder bed driving screw is connected to the output shaft of the powder bed driving motor, the other end of the powder bed driving screw is connected to the powder bed, and each side of the upper part of the powder bed supporting frame is provided with a An optical axis guide rail slide table, one optical axis guide rail is provided on both sides of the bottom of the powder bed, each of the optical axis guide rails passes through one optical axis guide rail slide table and can slide, and the powder bed is arranged on the On the optical axis guide rail, the powder bed driving motor drives the powder bed to move linearly on the optical axis guide rail by driving the powder bed driving screw.

Further, the powder spreading silo is a right-angled triangular prism, the upper end of the powder spreading silo is connected to the Z-axis movement mechanism, the upper end of the T-shaped opening and closing baffle is fixed on the sliding block of the opening and closing baffle, and the The output shaft of the opening and closing motor is connected to the opening and closing baffle slider, and the powder laying bin is used for storing 3D printing powder materials.

Further, the adhesion promoter spraying device includes an adhesion promoter liquid storage tank, a liquid supply pump and a liquid supply pump installation block, the adhesion promoter liquid storage tank is installed at a corner of the double gantry frame, the auxiliary The viscous liquid storage tank is connected to the inlet of the liquid supply pump through an adhesion promoter delivery pipe, and the outlet of the liquid supply pump is provided with an adhesion promoter nozzle, and the liquid supply pump is installed on the mounting block of the liquid supply pump. The mounting block of the liquid supply pump is fixed on the X-axis motion mechanism.

Further, the X-axis motion mechanism includes an X-axis motor, a synchronous pulley, an X-axis linear guide rail and an X-axis linear guide rail slider, the X-axis motor is installed on the side of the powder-spreading silo, and the X-axis motor The output shaft is connected to the synchronous pulley, and the synchronous pulley is connected to the X-axis linear guide rail slider through a synchronous belt. The synchronous belt drives the X-axis guide rail slider to move linearly along the X-axis direction in the X-axis linear guide rail.

Further, the Y-axis motion mechanism includes a Y-axis beam, a Y-axis screw and a Y-axis motor, the Y-axis beam is fixed on the double gantry frame, and the Y-axis straight line is arranged inside the Y-axis beam Guide rail, the Y-axis linear guide rail is provided with a Y-axis slider, one side of the Y-axis beam is provided with a Y-axis screw mounting seat, and the other side of the Y-axis beam is provided with a Y-axis motor mounting seat, the The Y-axis lead screw is installed on the Y-axis lead screw mount, the Y-axis motor is mounted on the Y-axis motor mount, the output shaft of the Y-axis motor is connected to the Y-axis lead screw, and the Y-axis motor is connected to the Y-axis lead screw. The shaft motor drives the Y-axis slider to move linearly in the Y-axis direction through the Y-axis lead screw.

Further, the Z-axis motion mechanism includes a Z-axis motor, a Z-axis lead screw and two symmetrically arranged Z-axis optical axis guide rails, one end of the two Z-axis optical axis guide rails is connected to the powder silo, and the other end is connected to the Z axis. A shaft motor mounting plate, the Z-axis motor is mounted on the Z-axis motor mounting plate, the output shaft of the Z-axis motor is connected to the Z-axis screw, and the two Z-axis optical axis guide rails are provided with cross sliders , the cross slider is vertically connected to the Y-axis screw and the Z-axis screw respectively, the lower end of the cross slider is connected to the upper end of the Y-axis slider, and the Z-axis motor drives the Z-axis screw through the Z-axis screw The powder spreading device and the adhesion promoter spraying device move linearly along the Z axis.

Further, the liquid supply pump is a peristaltic pump.

The beneficial effects brought by the technical solutions provided by the embodiments of the present invention are: a large-scale powder bed spray-liquid bonding 3D printer of the present invention uses powder materials mixed with a binder to lay on the powder bed, and then passes the adhesion promoter The droplet device sprays the adhesion promoter, reacts with the binder, solidifies and shapes, and finally prints a three-dimensional entity. The powder bed can be driven by the powder bed driving mechanism to expand the printing range of the printer and realize the printing of large-scale models. The invention has high printing efficiency and low cost, and is especially suitable for rapid production of large-scale industrialized models. It can make models for enterprises, schools and other users, and can also meet the individual needs of individuals.

Description of drawings

Figure 1 is an overall schematic diagram of a large powder bed liquid spray 3D printer.

Fig. 2 is a schematic structural view of the X-axis motion mechanism 3 in Fig. 1

FIG. 3 is a schematic structural view of the powder spreading device 6 and the adhesion promoter spraying device 7 in FIG. 1 .

FIG. 4 is a schematic view of the back side of the adhesion promoter spraying device 7 in FIG. 1 .

In the figure: 1-removable powder bed, 11-powder bed support frame, 12-powder bed driving motor, 13-optical axis slide table, 14-optical axis guide rail, 15-powder bed driving screw, 16-powder Bed, 2-double gantry frame, 3-X-axis motion mechanism, 31-X-axis motor, 32-synchronous pulley, 33-synchronous belt, 34-X-axis linear guide rail, 35-X-axis linear guide rail slider, 4 -Y-axis motion mechanism, 41-Y-axis beam, 42-Y-axis linear guide, 43-Y-axis screw mount, 44-Y-axis screw, 45-Y-axis slider, 46-Y-axis motor, 47- Y-axis motor mounting seat, 5-Z-axis motion mechanism, 51-cross slider, 52-Z-axis optical axis guide rail, 53-Z-axis motor mounting plate, 54-Z-axis motor, 55-Z-axis screw, 6- Powder spreading device, 61-powder spreading silo, 62-opening and closing motor, 63-T type opening and closing baffle, 64-opening and closing baffle slider, 65-powder outlet, 7-adhesion promoter spraying device, 71 -Adhesion promoter liquid storage tank, 72-Adhesion promoter delivery pipe, 73-Liquid supply pump, 74-Adhesion promoter nozzle, 75-Liquid supply pump installation block.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

Please refer to Fig. 1 and Fig. 2, the embodiment of the present invention provides a large-scale powder bed spray-liquid bonding 3D printer, including movable powder bed 1, double gantry frame 2, X-axis motion mechanism 3, Y-axis A motion mechanism 4 and a Z-axis motion mechanism 5, a powder spreading device 6 and an adhesion promoter spraying device 7.

The movable powder bed 1 includes a powder bed driving mechanism and a powder bed 16, and the powder bed driving mechanism includes a powder bed support frame 11, a powder bed driving motor 12, an optical axis guide rail slide 13, an optical axis guide rail 14 and a powder bed. Bed drive lead screw 15, the powder bed drive motor 12 is fixedly installed on the powder bed support frame 11, one end of the powder bed drive lead screw 15 is connected to the output shaft of the powder bed drive motor 12, and the powder bed drive The other end of the lead screw 15 is connected to the powder bed 16, an optical axis guide rail slide table 13 is respectively provided on both sides of the upper part of the powder bed support device 11, and an optical axis guide rail 14 is respectively provided on both sides of the bottom of the powder bed 16, Each of said optical axis guide rails 14 passes through a said optical axis guide rail slide table 13 and is slidable, said powder bed 16 is arranged on said optical axis guide rail 14, and said powder bed drive motor 12 drives said powder The bed driving screw 15 drives the powder bed 16 to reciprocate linearly along the optical axis guide rail 14, thereby expanding the 3D printing area.

The X-axis motion 3 mechanism includes an X-axis motor 31, a synchronous pulley 32, an X-axis linear guide rail 34 and an X-axis linear guide rail slider 35, and the X-axis motor 31 is installed on one side of the powder spreading device 6, so The output shaft of the X-axis motor 31 is connected to the synchronous pulley 32, and the synchronous pulley 32 is connected to the X-axis linear guide rail slider 35 through a synchronous belt 33, and the X-axis linear guide rail 34 is fixedly installed on the powder-spreading On the device 6 , the X-axis motor 31 drives the X-axis guide rail slider 35 to move linearly along the X-axis direction in the X-axis linear guide rail 34 through the timing belt 33 .

The Y-axis motion mechanism 4 includes a Y-axis beam 41, a Y-axis screw 44 and a Y-axis motor 46. The Y-axis beam 41 is fixed on the double-gantry frame 2, and the Y-axis beam 41 is provided with The Y-axis linear guide rail 42, the Y-axis linear guide rail 42 is provided with a Y-axis slider 45, one side of the Y-axis beam 41 is provided with a Y-axis screw mounting seat 43, and the other side of the Y-axis beam 41 A Y-axis motor mount 47 is provided on the side, the Y-axis lead screw 44 is mounted on the Y-axis lead screw mount 43, the Y-axis motor 46 is mounted on the Y-axis motor mount 47, the The output shaft of the Y-axis motor 46 is connected to the Y-axis screw 44 , and the Y-axis motor 46 drives the Y-axis slider 45 to move linearly in the Y-axis direction through the Y-axis screw 44 .

The Z-axis motion mechanism 5 includes a Z-axis motor 54, a Z-axis screw 55 and two symmetrically arranged Z-axis optical axis guide rails 53, one end of the two Z-axis optical axis guide rails 53 is connected to the powder spreading device 6, and the other end is Connect the Z-axis motor mounting plate 53, the Z-axis motor 54 is mounted on the Z-axis motor mounting plate 53, the output shaft of the Z-axis motor 54 is connected to the Z-axis screw 55, and the two Z-axis optical axes The guide rail 52 is provided with a cross slider 51, and the cross slider 51 is vertically screwed to the Y-axis screw 44 and the Z-axis screw 55 respectively, and the lower end of the cross slider 51 is connected to the upper end of the Y-axis slider 45 , the Z-axis motor 54 drives the powder spreading device 6 and the adhesion promoter spraying device 7 to move linearly along the Z-axis direction through the Z-axis screw rod 55 .

Please refer to FIG. 3 and FIG. 4, the powder spreading device 6 includes a powder spreading bin 61, an opening and closing motor 62 and a T-shaped opening and closing baffle 63, the powder spreading bin 61 is a right-angled triangular prism, and the powder spreading The upper end of the silo 61 is connected to the Z-axis optical axis guide rail 52, the back of the powder silo 61 is close to the T-shaped opening and closing baffle 63, and a powder outlet 65 is provided under the powder silo 61. The upper end of the T-shaped opening and closing baffle 63 is fixed on the opening and closing baffle slider 64, the output shaft of the opening and closing motor 62 is connected to the opening and closing baffle slider 64, and the powder spreading bin 61 is used to store 3D Printing powder materials, powder materials include base material and binder, the opening and closing motor 62 controls the opening and closing baffle slider 64 to move upwards to drive the T-shaped opening and closing baffles 63 to move upwards, thereby exposing the powder The outlet 65 makes the printing powder evenly spread on the powder bed 16 from the powder outlet 65, and the opening and closing motor 62 drives the T-shaped opening and closing baffle by controlling the downward movement of the opening and closing baffle slider 64 63 moves downwards, thereby closes described powder shop silo 61 so that printing powder is no longer paved.

The adhesion promoter spraying device 7 includes an adhesion promoter liquid storage tank 71, a liquid supply pump 73 and a liquid supply pump installation block 75, and the adhesion promoter liquid storage tank 71 is installed at a corner of the double gantry frame 2, The adhesion promoter liquid storage tank 71 stores an adhesion promoter, and the adhesion promoter can react with the binder in the powder material to promote the solidification and molding of the powder material. The viscous delivery pipe 72 is connected to the inlet of the liquid supply pump 73, the liquid supply pump 73 is a peristaltic pump, the outlet of the liquid supply pump 73 is provided with an adhesion promoter nozzle 74, and the liquid supply pump 73 is installed on the On the liquid supply pump mounting block 75, the liquid supply pump mounting block 75 is connected to the X-axis linear guide rail slider 35, along with the X-axis guide rail slider 35 in the X-axis linear guide rail 34 along the X-axis direction in a straight line.

In this embodiment, when performing 3D printing of powder materials, a layer of powder materials is uniformly laid on the powder bed 16 by the powder spreading device 6 first, and then the adhesion promoter spraying device 7 sprays and assists according to a predetermined trajectory. Adhesive, and then continue to spread powder and spray adhesion promoter, through the accumulation of layers until the 3D model is formed; when the large 3D model to be printed exceeds the X-axis motion mechanism 3, Y-axis motion mechanism 4 and Z-axis motion mechanism When the limit movement range of 5, can be divided into printing by moving described powder bed 16, after finishing single-format printing, described powder bed driving motor 12 drives described powder bed 16 to move a certain distance, to expand printing range, then Continue to spread powder to complete the printing of the next page. After completing the single-layer printing of the entire format, the next layer is printed in the same way, and a large three-dimensional model is formed by layer-by-layer accumulation and bonding.

Concrete steps when the present invention carries out three-dimensional model manufacturing are:

S1. Preparatory stage before 3D printing: close the powder-spreading silo 61, mix the powder materials (including matrix material and binder) evenly and put them into the powder-spreading silo 61, put the adhesion promoter into the In the adhesion promoter liquid storage tank 71, clean the adhesion promoter nozzle 74 and confirm that there is no blockage;

S2. Powder spreading stage: open the powder spreading silo 61, the Y-axis motion mechanism 4 starts to move, and after evenly laying powder material with a predetermined area on the powder bed 16, close the powder spreading silo 61 ;

S3, powder layer scraping stage: through the Y-axis motion mechanism 4 and the Z-axis motion mechanism 5, control the lower edge of the powder-spreading silo 61 to scrape the laid powder material;

S4, spraying the adhesion promoter stage: start the liquid supply pump 73, and simultaneously control the adhesion promoter nozzle 74 by the X-axis motion mechanism 3, the Y-axis motion mechanism 4 and the Z-axis motion mechanism 5 The injection of the adhesion promoter is carried out on a predetermined track, and when the injection of the adhesion promoter is completed, the liquid supply pump 73 is turned off; if printing in different formats is required, the powder bed drive motor 12 is used to control the powder bed 16 to move a format Width, continue to perform the actions of powder spreading, scraping and spraying adhesion promoter on the new format until the single layer printing is completed. If multi-layer printing is carried out, after the first layer of scanning is completed, the Z-axis motion mechanism 5 controls the powder spreading device 6 and the adhesion promoter spraying device 7 to rise to a height of one layer thick, and continues The second layer of powder spreading, scraping and spraying of adhesion promoters is repeated in this way, and the layers are bonded and accumulated until the three-dimensional model is completed.

S5. Model take-out and material recycling stage: After the 3D model is printed, turn off the printer, remove the surrounding powder materials that do not participate in the molding, take out the model, and recycle the powder materials that do not participate in the molding.

In this article, the orientation words such as front, rear, upper, and lower involved are defined by the parts in the drawings and the positions between the parts in the drawings, just for the clarity and convenience of expressing the technical solution. It should be understood that the use of the location words should not limit the scope of protection claimed in this application.

In the case of no conflict, the above-mentioned embodiments and features in the embodiments herein may be combined with each other.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (8)

1. A large-scale powder bed spray-liquid bonding type 3D printer is characterized in that: it comprises a movable powder bed, a double gantry frame, an X-axis motion mechanism, a Y-axis motion mechanism, a Z-axis motion mechanism, a powder spreading device and Adhesion promoter spraying device, the movable powder bed includes a powder bed drive mechanism and a powder bed, the powder bed is located inside the double gantry frame, the powder bed drive mechanism is connected to the powder bed and can drive The powder bed moves, the Y-axis motion mechanism is arranged on the upper part of the double gantry frame, the Y-axis motion mechanism is vertically connected to the Z-axis motion mechanism, and the lower end of the Z-axis motion mechanism is vertically connected to the X-axis A movement mechanism, the X-axis movement mechanism connects the powder spreading device and the adhesion promoter spraying device, the powder spreading device is arranged above the powder bed, and the powder spreading device includes a powder spreading silo, The opening and closing motor and the T-shaped opening and closing baffle. The movement mechanism, the Y-axis movement mechanism and the Z-axis movement mechanism are used to move the powder spreading device to a preset position, and the opening and closing motor drives the T-shaped opening and closing baffle to move upwards to open the powder spreading device. silo, the opening and closing motor drives the T-shaped opening and closing baffle to move down to close the powder spreading silo, the powder spreading device is used to lay powder material on the powder bed, and the adhesion promoter spray The dripping device is used to spray the adhesion promoter at a preset position on the powder bed. 2. A large-scale powder bed spray liquid bonding 3D printer as claimed in claim 1, characterized in that: the powder bed drive mechanism includes a powder bed support frame, a powder bed drive motor, an optical axis guide rail slide table, an optical A shaft guide rail and a powder bed driving screw, the powder bed driving motor is fixedly installed on the powder bed support frame, one end of the powder bed driving screw is connected to the output shaft of the powder bed driving motor, and the powder bed driving wire The other end of the bar is connected to the powder bed, and the two sides of the upper part of the powder bed supporting frame are respectively provided with a said optical axis guide rail slide table, and the two sides of the bottom of the powder bed are respectively provided with a said optical axis guide rail. The axis guide rail passes through a slide table of the optical axis guide rail and can slide, the powder bed is arranged on the optical axis guide rail, and the powder bed drive motor drives the powder bed by driving the powder bed drive screw The optical axis moves linearly on the guide rail. 3. A large-scale powder bed spray-liquid bonding 3D printer as claimed in claim 1, characterized in that: the powder-spreading silo is a right-angled triangular prism, and the upper end of the powder-spreading silo is connected to the Z-axis movement mechanism, the upper end of the T-shaped opening and closing baffle is fixed on the opening and closing baffle slider, the output shaft of the opening and closing motor is connected to the opening and closing baffle slider, and the powder shop is used to store 3D printing powder material. 4. A large-scale powder bed spray-liquid bonding 3D printer as claimed in claim 1, characterized in that: the adhesion promoter spraying device includes an adhesion promoter liquid storage tank, a liquid supply pump, and a liquid supply pump installation block, the adhesion promoter liquid storage tank is installed at a corner of the double gantry frame, the adhesion promoter liquid storage tank is connected with the inlet of the liquid supply pump through the adhesion promoter delivery pipe, and the outlet of the liquid supply pump is set There is an adhesion promoter nozzle, the liquid supply pump is installed on the liquid supply pump installation block, and the liquid supply pump installation block is fixed on the X-axis motion mechanism. 5. A large-scale powder bed spray-liquid bonding 3D printer according to claim 1, wherein the X-axis motion mechanism includes an X-axis motor, a timing pulley, an X-axis linear guide rail, and an X-axis linear guide rail slider, the X-axis motor is installed on the side of the powder-spreading silo, the output shaft of the X-axis motor is connected to the timing belt pulley, and the timing belt pulley is connected to the X-axis linear guide rail slider through a timing belt, The X-axis linear guide rail is fixedly installed on the powder-spreading silo, and the X-axis motor drives the X-axis guide rail slider to move linearly along the X-axis direction in the X-axis linear guide rail through the synchronous belt. 6. A large-scale powder bed spray-liquid bonding 3D printer as claimed in claim 1, characterized in that: the Y-axis motion mechanism includes a Y-axis beam, a Y-axis screw and a Y-axis motor, and the Y-axis The beam is fixed on the double gantry frame, the Y-axis linear guide rail is provided in the Y-axis beam, the Y-axis slider is provided in the Y-axis linear guide rail, and the Y-axis guide rail is provided on one side of the Y-axis beam. Screw mount, the other side of the Y-axis beam is provided with a Y-axis motor mount, the Y-axis lead screw is mounted on the Y-axis lead screw mount, and the Y-axis motor is mounted on the Y-axis On the motor mounting seat, the output shaft of the Y-axis motor is connected to the Y-axis screw, and the Y-axis motor drives the Y-axis slider to move linearly in the Y-axis direction through the Y-axis screw. 7. A large-scale powder bed spray-liquid bonding 3D printer as claimed in claim 6, characterized in that: the Z-axis motion mechanism includes a Z-axis motor, a Z-axis lead screw, and two symmetrically arranged Z-axis optical axes Guide rails, one end of the two Z-axis optical axis guide rails is connected to the powder-spreading silo, and the other end is connected to the Z-axis motor mounting plate, the Z-axis motor is mounted on the Z-axis motor mounting plate, and the Z-axis motor outputs The axis is connected to the Z-axis screw, and the two Z-axis optical axis guide rails are provided with cross sliders, and the cross sliders are vertically connected to the Y-axis screw and the Z-axis screw respectively, and the lower end of the cross slider Connecting the upper end of the Y-axis slider, the Z-axis motor drives the powder spreading device and the adhesion promoter spraying device to move linearly along the Z-axis direction through the Z-axis screw rod. 8. A large powder bed spray liquid bonding 3D printer as claimed in claim 4, characterized in that: the liquid supply pump is a peristaltic pump.